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Cheap flights from Idaho Falls to Illinois from $96

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to Illinois departing on 5/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Idaho Falls to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
2:31 pm - 10:44 pm
IDA
-
ORD
7h 13m
1 stop
United Airlines Logo
5:00 am - 9:55 am
ORD
-
IDA
5h 55m
1 stop
$286United Airlines
Sat, Jul 25 - Sat, Aug 1
United Airlines Logo
2:40 pm - 9:29 pm
IDA
-
ORD
5h 49m
1 stop
United Airlines Logo
7:00 am - 1:30 pm
ORD
-
IDA
7h 30m
1 stop
$299United Airlines
Thu, Feb 26 - Thu, Mar 12
Hawaiian Airlines Logo
8:00 am - 4:33 pm
IDA
-
ORD
7h 33m
1 stop
Hawaiian Airlines Logo
3:54 pm - 11:36 pm
ORD
-
IDA
8h 42m
1 stop
$314Hawaiian Airlines
Fri, Mar 6 - Thu, Mar 12
Delta Logo
3:16 pm - 9:50 pm
IDA
-
ORD
5h 34m
1 stop
Delta Logo
7:45 am - 2:34 pm
ORD
-
IDA
7h 49m
1 stop
$315Delta
Thu, May 7 - Tue, May 12
Delta Logo
6:55 pm - 12:21 am
IDA
-
STL
4h 26m
1 stop
Delta Logo
7:15 am - 12:27 pm
STL
-
IDA
6h 12m
1 stop
$323Delta
Wed, Mar 11 - Tue, Mar 17
United Airlines Logo
2:35 pm - 8:41 pm
IDA
-
STL
5h 06m
1 stop
United Airlines Logo
5:15 am - 9:56 am
STL
-
IDA
5h 41m
1 stop
$325United Airlines
Wed, Mar 11 - Tue, Mar 17
American Airlines Logo
1:43 pm - 10:45 pm
IDA
-
ORD
8h 02m
1 stop
American Airlines Logo
3:00 pm - 11:39 pm
ORD
-
IDA
9h 39m
1 stop
$330American Airlines
Wed, Apr 22 - Tue, Apr 28
Alaska Airlines Logo
4:06 pm - 11:59 pm
IDA
-
ORD
6h 53m
1 stop
Alaska Airlines Logo
6:00 am - 3:29 pm
ORD
-
IDA
10h 29m
1 stop
$331Alaska Airlines
Thu, May 7 - Tue, May 12
Alaska Airlines Logo
4:06 pm - 11:59 pm
IDA
-
ORD
6h 53m
1 stop
Alaska Airlines Logo
6:00 am - 3:29 pm
ORD
-
IDA
10h 29m
1 stop
$337Alaska Airlines
Thu, May 7 - Tue, May 12
American Airlines Logo
1:53 pm - 11:30 pm
IDA
-
MLI
8h 37m
1 stop
American Airlines Logo
6:00 am - 1:23 pm
MLI
-
IDA
8h 23m
1 stop
$682American Airlines
Thu, May 21 - Mon, May 25

American Airlines flights from Idaho Falls to Illinois

Our best American Airlines deals on Idaho Falls to Illinois flight tickets
American Airlines
Apr 22
IDA1:43 pmIdaho Falls Fanning Field
8h 02m
1 stop
ORD10:45 pmChicago O'Hare Intl
Apr 28
ORD3:00 pmChicago O'Hare Intl
9h 39m
1 stop
IDA11:39 pmIdaho Falls Fanning Field
$330
American Airlines
May 28
IDA12:36 pmIdaho Falls Fanning Field
3h 27m
ORD5:03 pmChicago O'Hare Intl
May 31
ORD10:49 amChicago O'Hare Intl
3h 34m
IDA1:23 pmIdaho Falls Fanning Field
$390
American Airlines
Jul 13
IDA12:41 pmIdaho Falls Fanning Field
3h 29m
ORD5:10 pmChicago O'Hare Intl
Jul 16
ORD10:36 amChicago O'Hare Intl
3h 37m
IDA1:13 pmIdaho Falls Fanning Field
$411

Alaska Airlines flights from Idaho Falls to Illinois

Our best Alaska Airlines deals on Idaho Falls to Illinois flight tickets
Alaska Airlines
May 7
IDA4:06 pmIdaho Falls Fanning Field
6h 53m
1 stop
ORD11:59 pmChicago O'Hare Intl
May 12
ORD6:00 amChicago O'Hare Intl
10h 29m
1 stop
IDA3:29 pmIdaho Falls Fanning Field
$331
Alaska Airlines
May 7
IDA4:06 pmIdaho Falls Fanning Field
6h 53m
1 stop
ORD11:59 pmChicago O'Hare Intl
May 12
ORD6:00 amChicago O'Hare Intl
10h 29m
1 stop
IDA3:29 pmIdaho Falls Fanning Field
$337
Alaska Airlines
Aug 4
IDA4:14 pmIdaho Falls Fanning Field
11h 46m
1 stop
ORD5:00 amChicago O'Hare Intl
Aug 6
ORD3:17 pmChicago O'Hare Intl
9h 42m
1 stop
IDA11:59 pmIdaho Falls Fanning Field
$353

momondo Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 15, 2026.
Use the filters below to find and compare flights from Idaho Falls to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 7/25

2:31 pm-10:44 pm

1 stop7h 13m

Chicago O'Hare Intl

Sat 8/1

5:00 am-9:55 am

1 stop5h 55m

$286

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 2/26

2:40 pm-9:29 pm

1 stop5h 49m

Chicago O'Hare Intl

Thu 3/12

7:00 am-1:30 pm

1 stop7h 30m

$299

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 3/6

8:00 am-4:33 pm

1 stop7h 33m

Chicago O'Hare Intl

Thu 3/12

3:54 pm-11:36 pm

1 stop8h 42m

$314

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 5/7

3:16 pm-9:50 pm

1 stop5h 34m

Chicago O'Hare Intl

Tue 5/12

7:45 am-2:34 pm

1 stop7h 49m

$315

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 3/11

6:55 pm-12:21 am

1 stop4h 26m

Lambert-St Louis

Tue 3/17

7:15 am-12:27 pm

1 stop6h 12m

$323

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 3/11

2:35 pm-8:41 pm

1 stop5h 06m

Lambert-St Louis

Tue 3/17

5:15 am-9:56 am

1 stop5h 41m

$325

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 4/22

1:43 pm-10:45 pm

1 stop8h 02m

Chicago O'Hare Intl

Tue 4/28

3:00 pm-11:39 pm

1 stop9h 39m

$330

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 5/7

4:06 pm-11:59 pm

1 stop6h 53m

Chicago O'Hare Intl

Tue 5/12

6:00 am-3:29 pm

1 stop10h 29m

$331

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 5/7

4:06 pm-11:59 pm

1 stop6h 53m

Chicago O'Hare Intl

Tue 5/12

6:00 am-3:29 pm

1 stop10h 29m

$337

Idaho FallsMoline

IDA - MLI

IDAMLI

Idaho Falls Fanning Field

Thu 5/21

1:53 pm-11:30 pm

1 stop8h 37m

Moline Quad-City

Mon 5/25

6:00 am-1:23 pm

1 stop8h 23m

$682

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Idaho Falls to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Idaho Falls to Illinois is on a Tuesday when prices can be found for as low as $331. Flights from Idaho Falls to Illinois on a Sunday will generally be more expensive and average around $669. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Idaho Falls to Illinois during this time can be as low as $426. Flights in the morning are often more expensive with an average ticket price of $426.

What is the cheapest Idaho Falls Fanning Field to Illinois flight route?

Fly from Idaho Falls Fanning Field to Chicago O'Hare Intl for the best Idaho Falls Fanning Field - Illinois flight prices

What cabin class options are available on Idaho Falls Fanning Field to Illinois flights?

There are 2 cabin classes available to choose from on Idaho Falls Fanning Field to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Idaho Falls to Illinois flights?

You could potentially save up to 3% on your flight if you consider stops on a Idaho Falls to Illinois flight.

Cheap Idaho Falls to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to Illinois

Best Price Found

$290

Fastest flight time

3h 20m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Idaho Falls in the past 72 hours is $290. The best round-trip flight deal from Idaho Falls to Illinois found on momondo in the last 72 hours is $424.
The fastest flight from Idaho Falls to Illinois takes 3h 20m
Direct flights go from Idaho Falls to Illinois every day.
There are 98 airports in Illinois. From Idaho Falls there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

  • When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Illinois?

    Prices for flights from Idaho Falls Fanning Field Airport to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Illinois?

  • How old do you have to be to fly from Idaho Falls Fanning Field Airport to Illinois?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Idaho Falls to Illinois?

Best airlines flying from Idaho Falls to Illinois

Compare and see reviews for airlines that fly from Idaho Falls to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $299Free CancellationRating
7.4
9,296 reviews
Search United Airlines flights
American AirlinesPriceFrom $323Free CancellationRating
7.2
11,297 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho Falls to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho Falls to Illinois for you.

Can I find flights from Idaho Falls to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Idaho Falls to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Idaho Falls to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Idaho Falls.

I’m not ready to book a flight from Idaho Falls to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Idaho Falls to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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